Cutting oil



'- Patented Aug. 30, 193:

UN IT E-D STATES PATENT OFFICE BENJAMIN GALLSWORTHY, OF BAYONNE, NEW JERSEY, ASSIGNOB TO THE TEXAS COMPANY, OF NEW YORK, N. Y A CORPORATION 01 DEQAWABE CUTTING OIL No Drawing.

This invention relates to cutting oils.

As is well known, the oflice of cutting oil is to cool the cutting tool and at the 'same time, lubricate the face of the-tool. Strai ht mineral oils can be used as cutting oils ut the more usual and better practice is to compound the mineral oil with a fixed oil such as lard oil,' sperm oil, cottonseed oil or the like.

The fixed oils are used for compounding with mineral oil because such mixtures are much more adhesive and oily than straight mineral oil.

I have found that a highly satisfactory cutting oil may be made by compounding mineral oil with oxidized paraflin wax or, preferably, with that fraction of partially oxidized paraiiin wax which has a melting application filed September 30, 1930. Serial No. 485,553.

mineral oil compounded with from 15% to of oxidized paraflin wax.

2. A cutting oil "consisting practically of a relatively low viscosity mineral lubricating oil compounded with from 15% to 30% of hand this 23rd da of September, 1930.

BE NJA IN GALLSWGRTHY.

point below 95 F., this product giving to I the compounded oil the desirable quality of 20 adhesiveness or oiliness. The oxidized wax may be subjected to sweating in the usual mannerto obtain the desired fraction having a melting point of 95 F. The oxidized araf fin wax is stable and does not tend to econipose with age in the manner that animal and vegetable oils become rancid, and in this respect oxidized parafiin wax is superior to oils such as lard, sperm or cottonseed oil as the compounding agent. Furthermore, the

added'product is less expensive than any of the animal and vegetable oils heretofore used; and on this account the ultimate cost of the final product can be lowered.

- I have found that a mineral lubricating oil having a Saybolt universal viscosity of about 100 seconds at 100 F. .cognpounded with from 15% to 30% of oxidizedparafiin wax produces a very satisfactory cutting oil. To meet the needs of large plants requiring cutting oils suitable for turning, drilling, reaming, threading, etc., it may be necessary to depart somewhat from the specifications above given and to use an oil of greater-or 45 lesser viscosity and more or less of the wax than the 15% to 30% mentioned, and I de- 60 1. A cutting oil consisting practically of 

